If you lock yourself inside the energy pellet spawner's room, you'll get some unique dialogue.
How do I do that?
Press the standing button to open the room with the energy pellet spawner.
Walk through the orange portal to get yourself inside
Shoot a portal at the scorch mark on the wall, and wait for the platform to be activated
Walk through your portal to get on top of the moving platform, then ride it to grab the portal gun upgrade. Do not shoot another blue portal.
Shoot an orange portal at any surface and walk through it.
What is the unique dialogue?
"Through no fault of the Enrichment Center, you have managed to trap yourself in this room. An escape hatch will open in three... Two... One."
Thanks to YouTuber Marblr; I found this softlock through their excellent "Every Softlock in Portal" video!
Guide help
This is the low-spoiler guide for "Breaking the puzzle" puzzle in Portal. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.
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